Question

Find the Cardinal number of setC = {x |25 < x < 40, x E Z}, where Z denotes the set containing all integers.

Answer 1

So, given

25 < x < 40

So, the numbers will be

26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39

These numbers are the numbers belongs to Z and achieve the inequality

Note: A Cardinal Number is a number that says how many of something there are.